Kennewick police have released the conclusions of the autopsy performed Wednesday. They say Kaitlin Austin died of multiple gun shots to her head and body. Ethan died of a single shot to the head.

The bodies were found in one of the bedrooms in their home with the gun nearby -- according to Ethan's father, Andrew Austin, who discovered the children around 5 p.m. Monday.

According to the Tri-City Herald, the police are stopping short of saying Ethan shot his sister and self at this time.

Ethan was 12 years old and a sixth-grader at Desert Hills Middle School in Kennewick. Kaitlin, 16, was a junior at Kamiakin High School in Kennewick. She was his half sister.